"The Fly Papers" are the contents of the blog X-Cop Fly Company, with all copyrighted content removed and replaced with summaries when needed. This book is Volume IV, Second Edition, which consists of all posts from January 2011 through June 2011. (To increase quality, the final post of June 2011 was excluded and will begin the next volume.) The first edition of Volume IV was uploaded/published on July 31, 2011. This is the second edition, published on November 3, 2011. The second edition includes minor revisions to the text, including an elimination of a possible copyright issue. No additional material from the blog has been added. This book is dedicated to the public domain according to the Creative Commons CC0 1.0 Universal Public Domain Dedication.